The reasonable shape of the alley is to make the structure in a good stress state under different formation pressure conditions. It can ensure the safety of the roadway and the most economical materials, and at the same time, the section excavation works are the lea…

In the past two years, the “new normal” appeared in the commercial vehicle sector. To cope with the new changes, Yuchai consolidated its advantages and further accelerated the development of the …

Recently, according to the latest reports from the media, Linglong Tire has been in the Jingmen factory in Hubei and has entered the stage of production and installation. It is expected that the first batch of tires will be produced in July.

Two-dimensional code access control is the most popular way to open the door for mobile phone access. It has unique visitor access function and high safety factor. It is widely used in office buildings, living quarters, joint office, gymnasium, etc. However, there are still many laymen. Peopl…

The fog and cloud have not been scattered, and groundwater pollution and soil pollution have become hot topics of public discussion.

The groundwater quality in our country has been seriously degraded. More than half of the 200 cities have extremely poor water quality. At the same tim…

There are two main points for the installation of explosion-proof distribution boxes : one is the choice of installation location, and the other is the choice of wiring installation.

Many users are still relatively unfamiliar with explosion-proof power distrib…